Display screen or portion thereof with icon



FIG. 1 is a front view of a display screen or portion thereof with icon, showing my design;

FIG. 2 is another front view thereof; and,

FIG. 3 is another front view thereof.

The broken lines showing a display screen or portion thereof form no part of the claimed design. 

CLAIM The ornamental design for a display screen or portion thereof with icon, as shown and described. 